The 50 Heaviest Songs Before Black Sabbath: #40-31

Guitar World counts down the heaviest songs before Black Sabbath. #50-41

33 - Arzachel, "Leg" (1969)
Uriel were a band formed in 1968 who then changed their name to Egg, then broke up, re-united and released their only album under the name Arzachel in 1969. Why their Wikipedia entry insists on calling them Uriel, we may never know.